code: def setUp(self):
      ray.init(
          num_cpus=1,
          object_store_memory=1000 * 1024 * 1024,
          ignore_reinit_error=True,
      )
  
file_path: ray/rllib/tests/test_filters.py
imports: import numpy
  import unittest
  import ray
  from ray.rllib.utils.filter import RunningStat, MeanStdFilter
  from ray.rllib.utils import FilterManager
  from ray.rllib.tests.mock_worker import _MockWorkerSet
label_desc: Use image node_id 1 for calling the FilterManagerTest obj's underlying member method code with example usage: obj.setUp() without return types